| The predigestion life cycle assessment method (LCA) has been applied to investigate the environmental impact of recycle copper process from copper-slag. First of all, all the data for each stage of input and output are collected by statistic analyses method. And then improving Eco-indicator99 is using to assess environmental impact of copper industry in China. Impact assessment model is established. Life cycle inventory (LCI) data are calculated in accordance with Eco-indicator99 of Simapro7.1 software and environmental impact single data is obtained. Finally, the result about environmental impact assessment is explained.Environmental impact of copper-slag and copper-ore recycle copper process is studied. Related environmental load data of each process stage have been obtained. Copper-slag recycle copper process includes crushing, milling, flotation, dehydration. Environmental impact single data of each process stage is 0.0168,0.0200,0.0615,0.0279, total environmental impact single data of copper-slag is 0.1262. Copper-ore recycle process includes mining, crushing, milling, flotation, dehydration. Environmental impact single data of each process stage is 0.1120,0.0138,0.0152,0.0617,0.0287, total environmental impact single data of copper-slag is 0.2314. Copper-slag recycle process has not mining process. Impact single score (Eco-indicator) of human health, ecosystem quality and resources is of copper-slag process is 82%,54%,19% of those of copper-ore process. The total impact single score of copper-slag process is 0.55 times than copper-ore. Recycle copper from slag will remarkably improve the utilization of resources, reduce environmental load and development of circulation economics. |
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